everyone from afghanistan's hamid karzai to cuba's raul castro to american presidents bush, carter and clinton and obama. president obama spoke to a standing ovation. >> 30 years ago while still a student i learned of nelson mandela and the struggles taking place in this beautiful land. and it stirred something in me. it woke me up to my responsibilities, to others and to myself. and it set me on an improbable journey that finds me here today and while i will always fall short of madiba's example, he makes me want to be a better man. he speaks to what's best inside us. >> reverend, senior pastor at ebeneezer baptist church and author of "the divided mind: the black church." welcome. >> good to be here, carol. >> president obama says mandela speaks to what's best inside each of us. many americans don't believe politicians are capable of this. still, it was wonderful to see presidents clinton, bush, carter and obama all together, mourning the same man in the same way. going forward, what do we take away from this? >> well, we witness today, carol, a moving tribute to a powerful and incre